2 * Palacios VNET Control Module
6 #include <linux/spinlock.h>
7 #include <linux/seq_file.h>
8 #include <linux/proc_fs.h>
9 #include <asm/uaccess.h>
10 #include <linux/inet.h>
11 #include <linux/kthread.h>
13 #include <linux/netdevice.h>
16 #include <linux/net.h>
17 #include <linux/string.h>
18 #include <linux/preempt.h>
19 #include <linux/sched.h>
22 #include <vnet/vnet.h>
23 #include <vnet/vnet_hashtable.h>
24 #include "palacios-vnet.h"
26 #define VNET_SERVER_PORT 9000
28 struct vnet_route_iter {
29 struct v3_vnet_route route;
32 struct list_head node;
36 struct vnet_link_iter {
39 vnet_brg_proto_t proto;
42 struct list_head node;
46 struct vnet_ctrl_state {
52 struct list_head route_list;
53 struct list_head link_iter_list;
57 struct proc_dir_entry * vnet_proc_root;
61 static struct vnet_ctrl_state vnet_ctrl_s;
64 static int parse_mac_str(char * str, uint8_t * qual, uint8_t * mac) {
67 printk("Parsing MAC (%s)\n", str);
70 if(strnicmp("any", str, strlen(str)) == 0){
73 }else if(strnicmp("none", str, strlen(str)) == 0){
77 if (strstr(str, "-")) {
78 token = strsep(&str, "-");
80 if (strnicmp("not", token, strlen("not")) == 0) {
83 printk("Invalid MAC String token (%s)\n", token);
88 if (strstr(str, ":")) {
91 if(*qual == MAC_NOSET){
95 for (i = 0; i < 6; i++) {
96 token = strsep(&str, ":");
98 printk("Invalid MAC String token (%s)\n", token);
101 mac[i] = simple_strtol(token, &token, 16);
103 printk("MAC: %2x:%2x:%2x:%2x:%2x:%2x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
106 printk("Invalid MAC String token (%s)\n", token);
116 static int str2mac(char * str, uint8_t * mac){
120 for (i = 0; i < ETH_ALEN; i++) {
121 hex = strsep(&str, ":");
123 printk("Invalid MAC String token (%s)\n", str);
126 mac[i] = simple_strtol(hex, &hex, 16);
133 static inline struct vnet_link_iter * link_by_ip(uint32_t ip) {
134 struct vnet_link_iter * link = NULL;
136 list_for_each_entry(link, &(vnet_ctrl_s.link_iter_list), node) {
138 if (link->dst_ip == ip) {
146 static inline struct vnet_link_iter * link_by_idx(int idx) {
147 struct vnet_link_iter * link = NULL;
149 list_for_each_entry(link, &(vnet_ctrl_s.link_iter_list), node) {
150 if (link->idx == idx) {
159 static int parse_route_str(char * str, struct v3_vnet_route * route) {
161 struct vnet_link_iter * link = NULL;
164 token = strsep(&str, " ");
168 parse_mac_str(token, &(route->src_mac_qual), route->src_mac);
171 token = strsep(&str, " ");
175 parse_mac_str(token, &(route->dst_mac_qual), route->dst_mac);
178 token = strsep(&str, " ");
182 printk("dst type =(%s)\n", token);
184 if (strnicmp("interface", token, strlen("interface")) == 0) {
185 route->dst_type = LINK_INTERFACE;
186 } else if (strnicmp("edge", token, strlen("edge")) == 0) {
187 route->dst_type = LINK_EDGE;
189 printk("Invalid Destination Link Type (%s)\n", token);
194 token = strsep(&str, " ");
198 printk("dst ID=(%s)\n", token);
200 // Figure out link here
201 if (route->dst_type == LINK_EDGE) {
204 // Figure out Link Here
205 if (in4_pton(token, strlen(token), (uint8_t *)&(link_ip), '\0', NULL) != 1) {
206 printk("Invalid Dst IP address (%s)\n", token);
210 link = link_by_ip(link_ip);
212 route->dst_id = link->idx;
214 printk("can not find dst link %s\n", token);
218 printk("link_ip = %d, link_id = %d\n", link_ip, link->idx);
219 } else if (route->dst_type == LINK_INTERFACE) {
220 uint8_t mac[ETH_ALEN];
222 if(str2mac(token, mac) == -1){
223 printk("wrong MAC format (%s)\n", token);
227 route->dst_id = v3_vnet_find_dev(mac);
228 if (route->dst_id == -1){
229 printk("can not find dst device %s\n", token);
233 printk("Unsupported dst link type\n");
238 route->src_type = -1;
241 token = strsep(&str, " ");
243 printk("SRC type = %s\n", token);
249 if (strnicmp("interface", token, strlen("interface")) == 0) {
250 route->src_type = LINK_INTERFACE;
251 } else if (strnicmp("edge", token, strlen("edge")) == 0) {
252 route->src_type = LINK_EDGE;
253 } else if (strnicmp("any", token, strlen("any")) == 0) {
254 route->src_type = LINK_ANY;
256 printk("Invalid Src link type (%s)\n", token);
261 if (route->src_type == LINK_ANY) {
263 } else if (route->src_type == LINK_EDGE) {
265 token = strsep(&str, " ");
271 // Figure out Link Here
272 if (in4_pton(token, strlen(token), (uint8_t *)&(src_ip), '\0', NULL) != 1) {
273 printk("Invalid SRC IP address (%s)\n", token);
277 link = link_by_ip(src_ip);
279 route->src_id = link->idx;
281 printk("can not find src link %s\n", token);
284 } else if(route->src_type == LINK_INTERFACE){
285 uint8_t mac[ETH_ALEN];
287 if(str2mac(token, mac) == -1){
288 printk("wrong MAC format (%s)\n", token);
292 route->src_id = v3_vnet_find_dev(mac);
293 if (route->src_id == -1){
294 printk("can not find dst device %s\n", token);
298 printk("Invalid link type\n");
306 static void * route_seq_start(struct seq_file * s, loff_t * pos) {
307 struct vnet_route_iter * route_iter = NULL;
310 if (*pos >= vnet_ctrl_s.num_routes) {
314 list_for_each_entry(route_iter, &(vnet_ctrl_s.route_list), node) {
326 static void * route_seq_next(struct seq_file * s, void * v, loff_t * pos) {
327 struct vnet_route_iter * route_iter = NULL;
329 route_iter = list_entry(((struct vnet_route_iter *)v)->node.next, struct vnet_route_iter, node);
331 // Check if the list has looped
332 if (&(route_iter->node) == &(vnet_ctrl_s.route_list)) {
341 static void route_seq_stop(struct seq_file * s, void * v) {
346 static void * link_seq_start(struct seq_file * s, loff_t * pos) {
347 struct vnet_link_iter * link_iter = NULL;
350 if (*pos >= vnet_ctrl_s.num_links) {
354 list_for_each_entry(link_iter, &(vnet_ctrl_s.link_iter_list), node) {
365 static int route_seq_show(struct seq_file * s, void * v) {
366 struct vnet_route_iter * route_iter = v;
367 struct v3_vnet_route * route = &(route_iter->route);
369 seq_printf(s, "%d:\t", route_iter->idx);
371 seq_printf(s, "\nSrc:\t");
372 switch (route->src_mac_qual) {
374 seq_printf(s, "any ");
377 seq_printf(s, "none ");
380 seq_printf(s, "not-%2x:%2x:%2x:%2x:%2x:%2x ",
381 route->src_mac[0], route->src_mac[1], route->src_mac[2],
382 route->src_mac[3], route->src_mac[4], route->src_mac[5]);
385 seq_printf(s, "%x:%x:%x:%x:%x:%x ",
386 route->src_mac[0], route->src_mac[1], route->src_mac[2],
387 route->src_mac[3], route->src_mac[4], route->src_mac[5]);
391 seq_printf(s, "\nDst:\t");
392 switch (route->dst_mac_qual) {
394 seq_printf(s, "any ");
397 seq_printf(s, "none ");
400 seq_printf(s, "not-%x:%x:%x:%x:%x:%x ",
401 route->src_mac[0], route->src_mac[1], route->src_mac[2],
402 route->src_mac[3], route->src_mac[4], route->src_mac[5]);
405 seq_printf(s, "%x:%x:%x:%x:%x:%x ",
406 route->src_mac[0], route->src_mac[1], route->src_mac[2],
407 route->src_mac[3], route->src_mac[4], route->src_mac[5]);
411 seq_printf(s, "\nDst-Type:\t");
412 switch (route->dst_type) {
414 struct vnet_link_iter * link = (struct vnet_link_iter *)link_by_idx(route->dst_id);
415 seq_printf(s, "EDGE %pI4", &link->dst_ip);
418 case LINK_INTERFACE: {
419 seq_printf(s, "INTERFACE ");
420 seq_printf(s, "%d ", route->dst_id);
424 seq_printf(s, "Invalid Dst Link Type (%d) ", route->dst_type);
428 seq_printf(s, "\nSrc-Type:\t");
429 switch (route->src_type) {
431 struct vnet_link_iter * link = (struct vnet_link_iter *)link_by_idx(route->src_id);
432 seq_printf(s, "EDGE %pI4", &link->dst_ip);
435 case LINK_INTERFACE: {
436 seq_printf(s, "INTERFACE %d", route->src_id);
440 seq_printf(s, "ANY");
443 seq_printf(s, "Invalid Src Link Type (%d) ", route->src_type);
452 static void * link_seq_next(struct seq_file * s, void * v, loff_t * pos) {
453 struct vnet_link_iter * link_iter = NULL;
455 link_iter = list_entry(((struct vnet_link_iter *)v)->node.next, struct vnet_link_iter, node);
457 // Check if the list has looped
458 if (&(link_iter->node) == &(vnet_ctrl_s.link_iter_list)) {
467 static void link_seq_stop(struct seq_file * s, void * v) {
472 static int link_seq_show(struct seq_file * s, void * v) {
473 struct vnet_link_iter * link_iter = v;
474 struct nic_statistics stats;
476 vnet_brg_link_stats(link_iter->idx, &stats);
478 seq_printf(s, "%d:\t%pI4\t%d\n\t\tReceived Pkts: %lld, Received Bytes %lld\n\t\tSent Pkts: %lld, Sent Bytes: %lld\n\n",
491 static struct seq_operations route_seq_ops = {
492 .start = route_seq_start,
493 .next = route_seq_next,
494 .stop = route_seq_stop,
495 .show = route_seq_show
499 static struct seq_operations link_seq_ops = {
500 .start = link_seq_start,
501 .next = link_seq_next,
502 .stop = link_seq_stop,
503 .show = link_seq_show
507 static int route_open(struct inode * inode, struct file * file) {
508 return seq_open(file, &route_seq_ops);
512 static int link_open(struct inode * inode, struct file * file) {
513 return seq_open(file, &link_seq_ops);
518 static int inject_route(struct vnet_route_iter * route) {
521 route->idx = v3_vnet_add_route(route->route);
523 spin_lock_irqsave(&(vnet_ctrl_s.lock), flags);
524 list_add(&(route->node), &(vnet_ctrl_s.route_list));
525 vnet_ctrl_s.num_routes ++;
526 spin_unlock_irqrestore(&(vnet_ctrl_s.lock), flags);
528 printk("VNET Control: One route added to VNET core\n");
534 static void delete_route(struct vnet_route_iter * route) {
537 v3_vnet_del_route(route->idx);
539 spin_lock_irqsave(&(vnet_ctrl_s.lock), flags);
540 list_del(&(route->node));
541 vnet_ctrl_s.num_routes --;
542 spin_unlock_irqrestore(&(vnet_ctrl_s.lock), flags);
544 printk("VNET Control: Route %d deleted from VNET\n", route->idx);
552 * add src-MAC dst-MAC dst-TYPE [dst-ID] src-TYPE [src-ID]
554 * src-MAC = dst-MAC = not-MAC|any|none|MAC
555 * dst-TYPE = edge|interface
556 * src-TYPE = edge|interface|any
557 * dst-ID = src-ID = IP|MAC
558 * MAC=xx:xx:xx:xx:xx:xx
559 * IP = xxx.xxx.xxx.xxx
566 route_write(struct file * file,
571 char * buf_iter = NULL;
572 char * line_str = route_buf;
579 if (copy_from_user(route_buf, buf, size)) {
583 route_buf[size] = '\0';
584 printk("Route written: %s\n", route_buf);
586 while ((buf_iter = strsep(&line_str, "\r\n"))) {
588 token = strsep(&buf_iter, " ");
593 if (strnicmp("ADD", token, strlen("ADD")) == 0) {
594 struct vnet_route_iter * new_route = NULL;
595 new_route = kmalloc(sizeof(struct vnet_route_iter), GFP_KERNEL);
601 memset(new_route, 0, sizeof(struct vnet_route_iter));
603 if (parse_route_str(buf_iter, &(new_route->route)) == -1) {
608 if (inject_route(new_route) != 0) {
612 } else if (strnicmp("DEL", token, strlen("DEL")) == 0) {
613 char * idx_str = NULL;
615 struct vnet_route_iter * route = NULL;
617 idx_str = strsep(&buf_iter, " ");
620 printk("Missing route idx in DEL Route command\n");
624 d_idx = simple_strtoul(idx_str, &idx_str, 10);
626 printk("VNET: deleting route %d\n", d_idx);
628 list_for_each_entry(route, &(vnet_ctrl_s.route_list), node) {
629 if (route->idx == d_idx) {
635 printk("Invalid Route command string\n");
643 static void delete_link(struct vnet_link_iter * link){
646 vnet_brg_delete_link(link->idx);
648 spin_lock_irqsave(&(vnet_ctrl_s.lock), flags);
649 list_del(&(link->node));
650 vnet_ctrl_s.num_links --;
651 spin_unlock_irqrestore(&(vnet_ctrl_s.lock), flags);
658 static void deinit_links_list(void){
659 struct vnet_link_iter * link;
661 list_for_each_entry(link, &(vnet_ctrl_s.link_iter_list), node) {
666 static void deinit_routes_list(void){
667 struct vnet_route_iter * route;
669 list_for_each_entry(route, &(vnet_ctrl_s.route_list), node) {
674 /* ADD dst-ip 9000 [udp|tcp] */
677 link_write(struct file * file, const char * buf, size_t size, loff_t * ppos) {
679 char * link_iter = NULL;
680 char * line_str = link_buf;
687 if (copy_from_user(link_buf, buf, size)) {
691 while ((link_iter = strsep(&line_str, "\r\n"))) {
692 printk("Link written: %s\n", link_buf);
694 token = strsep(&link_iter, " ");
700 if (strnicmp("ADD", token, strlen("ADD")) == 0) {
701 struct vnet_link_iter * link = NULL;
702 char * ip_str = NULL;
705 vnet_brg_proto_t d_proto;
709 ip_str = strsep(&link_iter, " ");
711 if ((!ip_str) || (!link_iter)) {
712 printk("Missing fields in ADD Link command\n");
716 if (in4_pton(ip_str, strlen(ip_str), (uint8_t *)&(d_ip), '\0', NULL) != 1) {
717 printk("Invalid Dst IP address (%s)\n", ip_str);
721 d_port = simple_strtol(link_iter, &link_iter, 10);
724 link_idx = vnet_brg_add_link(d_ip, d_port, d_proto);
726 printk("VNET Control: Failed to create link\n");
730 link = kmalloc(sizeof(struct vnet_link_iter), GFP_KERNEL);
731 memset(link, 0, sizeof(struct vnet_link_iter));
734 link->dst_port = d_port;
735 link->proto = d_proto;
736 link->idx = link_idx;
738 spin_lock_irqsave(&(vnet_ctrl_s.lock), flags);
739 list_add(&(link->node), &(vnet_ctrl_s.link_iter_list));
740 vnet_ctrl_s.num_links ++;
741 spin_unlock_irqrestore(&(vnet_ctrl_s.lock), flags);
742 } else if (strnicmp("DEL", token, strlen("DEL")) == 0) {
743 char * idx_str = NULL;
746 idx_str = strsep(&link_iter, " ");
749 printk("Missing link idx in DEL Link command\n");
753 d_idx = simple_strtoul(idx_str, &idx_str, 10);
755 vnet_brg_delete_link(d_idx);
757 printk("VNET Control: One link deleted\n");
759 printk("Invalid Link command string\n");
767 static struct file_operations route_fops = {
768 .owner = THIS_MODULE,
771 .write = route_write,
773 .release = seq_release
777 static struct file_operations link_fops = {
778 .owner = THIS_MODULE,
783 .release = seq_release
788 debug_write(struct file * file, const char * buf, size_t size, loff_t * ppos) {
790 char * in_iter = NULL;
791 char * line_str = in_buf;
798 if (copy_from_user(in_buf, buf, size)) {
802 in_iter = strsep(&line_str, "\r\n");
803 level = simple_strtol(in_iter, &in_iter, 10);
805 printk("VNET Control: Set VNET Debug level to %d\n", level);
815 static int debug_show(struct seq_file * file, void * v){
816 seq_printf(file, "Current NET Debug Level: %d\n", net_debug);
821 static int debug_open(struct inode * inode, struct file * file) {
822 return single_open(file, debug_show, NULL);
825 static struct file_operations debug_fops = {
826 .owner = THIS_MODULE,
829 .write = debug_write,
831 .release = seq_release
834 static int stat_show(struct seq_file * file, void * v){
835 struct vnet_stat stats;
836 struct vnet_brg_stats brg_stats;
838 v3_vnet_stat(&stats);
840 seq_printf(file, "VNET Core\n");
841 seq_printf(file, "\tReceived Packets: %d\n", stats.rx_pkts);
842 seq_printf(file, "\tReceived Bytes: %lld\n", stats.rx_bytes);
843 seq_printf(file, "\tTransmitted Packets: %d\n", stats.tx_pkts);
844 seq_printf(file, "\tTransmitted Bytes: %lld\n", stats.tx_bytes);
846 vnet_brg_stats(&brg_stats);
848 seq_printf(file, "\nVNET Bridge Server\n");
849 seq_printf(file, "\tReceived From VMM: %lld\n", brg_stats.pkt_from_vmm);
850 seq_printf(file, "\tSent To VMM: %lld\n", brg_stats.pkt_to_vmm);
851 seq_printf(file, "\tDropped From VMM: %lld\n", brg_stats.pkt_drop_vmm);
852 seq_printf(file, "\tReceived From Extern Network: %lld\n", brg_stats.pkt_from_phy);
853 seq_printf(file, "\tSent To Extern Network: %lld\n", brg_stats.pkt_to_phy);
854 seq_printf(file, "\tDropped From Extern Network: %lld\n", brg_stats.pkt_drop_phy);
859 static int stat_open(struct inode * inode, struct file * file) {
860 return single_open(file, stat_show, NULL);
863 static struct file_operations stat_fops = {
864 .owner = THIS_MODULE,
868 .release = seq_release
872 static int init_proc_files(void) {
873 struct proc_dir_entry * route_entry = NULL;
874 struct proc_dir_entry * link_entry = NULL;
875 struct proc_dir_entry * stat_entry = NULL;
876 struct proc_dir_entry * debug_entry = NULL;
877 struct proc_dir_entry * vnet_root = NULL;
879 vnet_root = proc_mkdir("vnet", NULL);
880 if (vnet_root == NULL) {
884 route_entry = create_proc_entry("routes", 0, vnet_root);
885 if (route_entry == NULL) {
886 remove_proc_entry("vnet", NULL);
889 route_entry->proc_fops = &route_fops;
892 link_entry = create_proc_entry("links", 0, vnet_root);
893 if (link_entry == NULL) {
894 remove_proc_entry("routes", vnet_root);
895 remove_proc_entry("vnet", NULL);
898 link_entry->proc_fops = &link_fops;
901 stat_entry = create_proc_entry("stats", 0, vnet_root);
902 if(stat_entry == NULL) {
903 remove_proc_entry("links", vnet_root);
904 remove_proc_entry("routes", vnet_root);
905 remove_proc_entry("vnet", NULL);
908 stat_entry->proc_fops = &stat_fops;
911 debug_entry = create_proc_entry("debug", 0, vnet_root);
912 if(debug_entry == NULL) {
913 remove_proc_entry("links", vnet_root);
914 remove_proc_entry("routes", vnet_root);
915 remove_proc_entry("stats", vnet_root);
916 remove_proc_entry("vnet", NULL);
919 debug_entry->proc_fops = &debug_fops;
921 vnet_ctrl_s.vnet_proc_root = vnet_root;
927 static void destroy_proc_files(void) {
928 struct proc_dir_entry * vnet_root = vnet_ctrl_s.vnet_proc_root;
930 remove_proc_entry("debug", vnet_root);
931 remove_proc_entry("links", vnet_root);
932 remove_proc_entry("routes", vnet_root);
933 remove_proc_entry("stats", vnet_root);
934 remove_proc_entry("vnet", NULL);
938 int vnet_ctrl_init(void) {
939 if(vnet_ctrl_s.status != 0) {
942 vnet_ctrl_s.status = 1;
944 memset(&vnet_ctrl_s, 0, sizeof(struct vnet_ctrl_state));
946 INIT_LIST_HEAD(&(vnet_ctrl_s.link_iter_list));
947 INIT_LIST_HEAD(&(vnet_ctrl_s.route_list));
948 spin_lock_init(&(vnet_ctrl_s.lock));
952 printk("VNET Linux control module initiated\n");
958 void vnet_ctrl_deinit(void){
959 destroy_proc_files();
962 deinit_routes_list();
964 vnet_ctrl_s.status = 0;